Amber often means the PC is in sleep mode. Holding space space for 4 seconds brings it back.
IF you mean you cannot boot then please say so, and describe what you do see and hear. Like disk spins up, monitor goes from standby to active but after the bios windows hangs.. or i hit the power button and other than these two lights nothing happens.
Here is a starting ref.
http://www.tomshardware.com/forum/261145-31-perform-steps-posting-boot-video-problems